Jquery. One callback after multiple hiding?

Question

JavaScript

There is such a code: https://codepen.io/anon/pen/VQwyoO
The fact is that by hiding all these elements, the same callback is launched for each. For example, 100 elements - 100 callbacks, why? I do not need to call 100 identical callbacks (and the code in other scripts does not work correctly). You only need to execute 1 function after all the elements are hidden.
What does jquery provide for this?

Answer 1

You can use $.when like this .